On 12 June 2019, the Vehicular Air Pollutant Emission Standards were revised and renamed the Mobile Pollution Source Air Pollutant Emissions Standards. In accordance with Article 5 of the emissions standards, the Phase 6 diesel vehicle emission standards will take effect on 1 September 2019. The Phase 6 standards require the installation of pollution control equipment on heavy-duty diesel trucks, which increases the price of the trucks compared to the Phase 5 ones and may affect the public’s interest in switching over. The EPA has thus extended the production, manufacture and import of Phase 5 heavy-duty diesel vehicles for two years to facilitate the replacement of old vehicles.
The emissions standards were revised mainly to adjust Article 5 Part 9, so that it would allow all heavy-duty diesel vehicles with a certificate of conformity that was issued before 31 August 2019 to continue to be produced, manufactured or imported until 31 August 2021.
According to the amendments to the emissions standards made on 27 December 2016, the Phase 6 diesel vehicle emission standards shall enter into force on 1 September 2019. The Phase 6 standards were formulated based on the EU 6 standards, among which the regulations for heavy-duty trucks and buses have already been in effect since 1 January 2014. Compared to the Phase 5 standards, Phase 6 standards for heavy-duty trucks and buses have stricter restrictions on air pollutants (NOX emissions tightened by 80% and PM emissions tightened by 50%). Additionally, the Phase 6 standards also offer an extended emission durability warranty and include emission limits for NH3 and solid particle number (PN).
However, due to the stricter emission control policies, vehicles will need to install pollution control devices with higher performance and efficiency. Therefore, to reduce the impacts from the increase of cost in pollution control devices, the EPA has amended the emissions standards to include a grace period. According to Article 5 Part 9 of the revised emissions standards, all heavy-duty diesel vehicles with a certificate of conformity issued before 31 August 2019 may continue to be produced (date of production for domestic vehicles) or imported (shipped on board date for imported vehicles) until 31 August 2021.
Excerpt from Environmental Policy Monthly, 22 (7)
- Environmental Protection Administration, R.O.C.(Taiwan)